--May I speak to your manager at four o’clock this afternoon?
--I’m sorry. He ________ to a conference long before then.
| A．will have gone | B．had gone | C．would go | D．has gone |
Rather than _______everything to the last minute, I always prefer starting early.
| A．to leave | B．leave | C．leaving | D．left |
The student must have been ill yesterday, ______?
| A．mustn’t he | B．needn’t he | C．didn’t he | D．wasn’t he |
If you ______ earlier, you ________ him.
| A．came; would meet | B．had come; would have met |
| C．had come; would meet | D．would come; met |
Great changes __________ in our hometown in the past twenty years..
| A．have been taken place | B．has been taken place |
| C．have taken place | D．were taken place |
John, look at the time. ________ you play the piano at such a late hour?
| A．Can | B．Need | C．May | D．Must |